This TV remote control receiver uses a ratchet system to activate an old drum-type selector to change channels. A common system at the time. The circuit is from a Radio Electronics from February 1961.
This circuit was obtained from an American publication of 1982, but can be assembled with ease...
With this shield circuit, you can control LEDs from an AND gate or microcontroller. When both...
This simple circuit makes it possible to test visual fatigue by the ability to detect higher...